JPH02303631A - Pipe bender - Google Patents

Abstract

PURPOSE:To execute bending of a free radius of curvature by installing a pipe guide in front of a pipe chuck device, and installing a plunger punch connected to a vibration generating device in front of its pipe guide. CONSTITUTION:A pipe guide 5 is installed in front of a pipe chuck device 3. A plunger punch 8 connected to a vibration generating device 7 is installed in front of the pipe guide 5. The pipe chuck device 3 is installed in a pipe inclining and rolling device 4. A mandrel device 11 is provided on the axis center. In such a way, the work efficiency of bending of a pipe can be improved remarkably.

Description

[Detailed Description of the Invention] [Object of the Invention] 1. Awagami Yuhada and Vertical The present invention provides a pipe bender that enables bending of pipes with different radii of curvature without changing rolls or molds. It is related to.

Previously, three-point roll or mold pressing methods have been known and put to practical use as bending methods in pipe benders, but both methods involve supporting both ends of the pipe and pressing rolls or molds. Since the bending process was carried out by bending, the rolls or molds had to be replaced for each radius of curvature of the pipe, which required replacement and setup work, resulting in very low work efficiency.

In addition, rolls or molds have the drawback that extremely large or extremely small rolls or molds cannot be installed and can only be bent with a radius of curvature within a predetermined range. Because of the curvature of Bendering is possible by rotating the pipe at the end of the bending process, but it has the disadvantage that three-dimensional bending is not possible during the bending process.

The present invention is capable of bending pipes with different radii of curvature without replacing rolls or dies by sliding the pipe and pressing the bent part with a vibrating die. A pipe that greatly improves work efficiency by eliminating the need for exchanging rolls or dies or setting up work, and also enables composite R processing and three-dimensional bending with different radii of curvature during pipe bending. It is intended to provide vendors.

[Structure of the invention]

1 In view of this, the present invention includes a pipe guide installed in front of a pipe chuck device, a pressing die connected to a vibration generator in front of the pipe guide, and a pipe chuck installed in a pipe tilting device. The present invention attempts to solve the above-mentioned drawbacks by providing a pipe bender in which a device is installed and a core device is arranged on the axis.

The present invention bends the pipe by gradually advancing the pipe and pressing the bending part with a vibrating die, and also performs compound bending by changing the driving conditions of the die. Rotate the pipe to perform three-dimensional bending,
The pipe is pressed with a die and a core metal to make it thinner and easier to bend.

10 pieces or less An embodiment of the present invention will be described based on the drawings. 1 is a pipe bender for bending a pipe A, and a pipe tilting device 4 with a pipe chuck device 3 disposed around it is mounted on the upper surface of a base 2. A pipe guide 5 is installed in front of the pipe chuck device 3 (pipe tilting device 4) so as to be slidable, through which the pipe A, which is a workpiece, is inserted.

6 is a feed screw arranged horizontally on the upper surface of the base 2, and the feed screw 6 is inserted into the inside of the pipe tilting device 4,
By rotating the feed screw 6, the pipe tilting device 4 is slid.

A vibration generator 7 is installed on the base 2 at the lower front of the pipe guide 5. A pressing die 8 is connected to the upper part of the vibration generator 7, and the vibration generator 7 can be slid horizontally to prevent the pipe from moving. The sliding amount and frequency of the vibration generator 7 and the pressing force of the mold 8, which determine the radius of curvature of A, are automatically controlled.

Reference numeral 9 denotes a pipe groove bored in the upper surface of the mold 8, and a curved pressing portion 10 having an apex is formed within the pipe groove 9.

Reference numeral 11 denotes a core metal device disposed on the axis behind the pipe tilting device W4, the core metal device 11 holds the base end of the core metal 12, and the tip of the core metal 12 is inserted into the pipe A. It extends to a position corresponding to the apex of the pressing part 10 of the pressing mold 8 (bending start position).

Next, to explain the operation of the pipe bender according to the present invention, the pipe A is gradually advanced by sliding the pipe chuck device 3, and the press mold 8 is placed at the bending start position of the pipe A.
The pipe A is pressed at the apex of the pressing part 10 while vibrating the mold 8, and the pipe A is bent in minute units, and the pipe A is bent to a predetermined radius of curvature as a whole.

In addition, the radius of curvature can be changed arbitrarily by sliding the mold 8 to the left and right together with the vibration generator 7, changing the pressing force of the mold 8, and increasing or decreasing the frequency of the vibration generator 7. By changing the above conditions during processing, the radius of curvature can be changed to create a compound R.

Moreover, if the pipe A is rotated by the pipe tilting device 4,
During the bending process, three-dimensional bending can be performed rather than flat bending, and if pipe A is bent, the outer wall thickness will be thinner at the bent part, but the core metal 12
It is pressed by the press die 8 to form a thin wall and facilitate bending.

〔Effect of the invention〕

In short, in the present invention, the pipe guide 5 is installed in front of the pipe chuck device 3, and the press die 8 connected to the vibration generator 7 is installed in front of the pipe guide 5. By pressing with Because of the pressing, the pressing mold 8 corresponding to the radius of curvature is no longer necessary, and the radius of curvature of pipe A can be maximized or minimized, and compound R processing with different radii of curvature can be performed in the middle of bending pipe A. Moreover, a coil material can be used for the pipe A. Also, since the pipe chuck device 3 is installed in the pipe tilting device 4, three-dimensional bending can be performed by rotating the pipe A during bending. It is.

In addition, since the core metal device 11 is arranged on the axis, the inner diameter of the pipe A is adjusted by inserting the core metal 12 into the bending start position in the pipe A, and pressing it with the press die 8 and the core metal 12 at the bending part. Its practical effects are enormous, such as making it easier to bend the outer diameter by making the outer diameter one piece.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view of a pipe bender, and FIG. 2 is an enlarged front view in partial section of a processed portion when a core metal is used. 3 Pipe chuck device 4 Pipe tilting device 5 Pipe guide 7 Vibration generator 8 Press mold 11 Core metal device or more

Claims (3)

[Claims] (1) A pipe bender characterized in that a pipe guide is installed in front of a pipe chuck device, and a press mold connected to a vibration generator is installed in front of the pipe guide. (2) The pipe bender according to claim 1, wherein a pipe chuck device is installed in the pipe tilting device. (3) The pipe bender according to claim 1 or 2, characterized in that the core device is arranged on the axis.